{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54253","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-12T16:25:43.086Z","datePublished":"2026-09-17T18:37:38.022Z","dateUpdated":"2026-09-23T19:44:00.241Z"},"containers":{"cna":{"title":"TS3 Manager: Reflected XSS via /api/download port parameter steals operator session","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/joni1802/ts3-manager/security/advisories/GHSA-3cgm-7p4g-gffj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/joni1802/ts3-manager/security/advisories/GHSA-3cgm-7p4g-gffj"},{"name":"https://github.com/joni1802/ts3-manager/commit/48df540786d2784c5d7b9bd55786d63e31288d07","tags":["x_refsource_MISC"],"url":"https://github.com/joni1802/ts3-manager/commit/48df540786d2784c5d7b9bd55786d63e31288d07"},{"name":"https://github.com/joni1802/ts3-manager/releases/tag/v2.2.6","tags":["x_refsource_MISC"],"url":"https://github.com/joni1802/ts3-manager/releases/tag/v2.2.6"}],"affected":[{"vendor":"joni1802","product":"ts3-manager","versions":[{"version":"< 2.2.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-17T18:37:38.022Z"},"descriptions":[{"lang":"en","value":"TS3 Manager is modern web interface for maintaining Teamspeak3 servers. Prior to 2.2.6, the /api/download handler in packages/server/routes/api.js passes the attacker-controlled port query parameter to socket.connect(port, host) and returns the resulting error.message through res.status(400).send(error.message) as text/html without a Content Security Policy. When a logged-in operator follows a crafted top-level link, the reflected value executes in the manager origin. The token cookie set in packages/ui/src/store/modules/query.js lacks HttpOnly, Secure, and an explicit SameSite attribute, allowing the script to read the token and call the autofillform event in packages/server/socket.js. autofillform returns the decoded JWT, including the cleartext ServerQuery password, enabling operator-session hijacking and control of the managed TeamSpeak server when the operator uses administrative ServerQuery credentials. A valid operator session and user interaction are required. This issue is fixed in 2.2.6."}],"source":{"advisory":"GHSA-3cgm-7p4g-gffj","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/joni1802/ts3-manager/security/advisories/GHSA-3cgm-7p4g-gffj","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T19:43:53.927806Z","id":"CVE-2026-54253","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-23T19:44:00.241Z"}}]}}